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      <a id="GEN05"></a>
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        <h2>
          <span class="refentrytitle">GEN05</span>
        </h2>
        <p>GEN05 — 
      Constructs functions from segments of exponential curves.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp213590992"></a>
        <h2>Description</h2>
        <p>
      Constructs functions from segments of exponential curves.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp213666672"></a>
        <h2>Syntax</h2>
        <pre class="synopsis"><span class="command"><strong>f</strong></span> # time size 5 a n1 b n2 c ...</pre>
      </div>
      <div class="refsect1">
        <a id="idp213668736"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>size </em></span> -- number of points in the table. Must be a power of 2 or power-of-2 plus 1 (see <a class="link" href="f.html" title="f Statement (or Function Table Statement)"><em class="citetitle">f statement</em></a>).
    </p>
        <p>
      <span class="emphasis"><em>a, b, c,</em></span> etc. -- ordinate values, in odd-numbered pfields p5, p7, p9, . . . These must be nonzero and must be alike in sign.
    </p>
        <p>
      <span class="emphasis"><em>n1, n2</em></span>, etc. -- length of segment (no. of
      storage locations), in even-numbered pfields. Cannot be
      negative, but a zero is meaningful for specifying discontinuous
      waveforms. The sum <span class="emphasis"><em>n1</em></span> +
      <span class="emphasis"><em>n2</em></span> + .... will normally equal
      <span class="emphasis"><em>size</em></span> for fully specified functions. If the
      sum is smaller, the function locations not included will be set
      to zero; if the sum is greater, only the first
      <span class="emphasis"><em>size</em></span> locations will be stored.  Note that
      the values are rounded to integers before use.
    </p>
        <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
          <table border="0" summary="Note: Note">
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              </td>
              <th align="left">Note</th>
            </tr>
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                <p>
        </p>
                <div class="itemizedlist">
                  <ul class="itemizedlist" style="list-style-type: disc; ">
                    <li class="listitem">
                      <p>
              If p4 is positive, functions are post-normalized (rescaled to a maximum absolute value of 1 after generation). A negative p4 will cause rescaling to be skipped.
            </p>
                    </li>
                    <li class="listitem">
                      <p>
              Discrete-point linear interpolation implies an increase or decrease along a segment by equal differences between adjacent locations; exponential interpolation implies that the progression is by equal ratio. In both forms the interpolation from <span class="emphasis"><em>a</em></span> to <span class="emphasis"><em>b</em></span> is such as to assume that the value <span class="emphasis"><em>b</em></span> will be attained in the n + 1th location. For discontinuous functions, and for the segment encompassing the end location, this value will not actually be reached, although it may eventually appear as a result of final scaling.
            </p>
                    </li>
                  </ul>
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                <p>
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      <div class="refsect1">
        <a id="idp213681328"></a>
        <h2>Examples</h2>
        <p>
      Here is a simple example of the GEN05 routine. It uses the files <a class="ulink" href="examples/gen05.csd" target="_top"><em class="citetitle">gen05.csd</em></a>.
      </p>
        <div class="example">
          <a id="idp213683200"></a>
          <p class="title">
            <strong>Example 1095. An example of the GEN05 routine.</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac      <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o gen05.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100 
<span class="ohdr">ksmps</span> <span class="op">=</span> 32 
<span class="ohdr">nchnls</span> <span class="op">=</span> 2 
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1 

<span class="oblock">instr</span> 1

ifn <span class="op">=</span> p4					<span class="comment">;choose different tables for GEN05</span>
kcps <span class="opc">init</span> 1<span class="op">/</span>p3					<span class="comment">;index over the length of  entire note</span>
kndx <span class="opc">phasor</span> kcps
ixmode <span class="op">=</span> 1					<span class="comment">;normalize index data</span>
kamp <span class="opc">tablei</span> kndx, ifn, ixmode
asig <span class="opc">poscil</span> kamp, 440, 1
     <span class="opc">outs</span> asig, asig

<span class="oblock">endin</span>
<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="stamnt">f</span> 1 0 8192 10 1	<span class="comment">;sine wave</span>
<span class="stamnt">f</span> 2 0 129 5    1   100 0.0001 29 		<span class="comment">;short attack</span>
<span class="stamnt">f</span> 3 0 129 5 0.00001 87    1   22 .5 20 0.0001 	<span class="comment">;long attack</span>


<span class="stamnt">i</span> 1 0 2 2
<span class="stamnt">i</span> 1 3 2 3

<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
          </div>
        </div>
        <p><br class="example-break" />

        <span class="phrase">These are the diagrams of the waveforms of the GEN05 routines, as used in the example:</span>

      </p>
        <div class="mediaobject">
          <img src="images/gen05_1.png" alt="f 2 0 129 5 1 100 0.0001 29 - waveform that goes over 100 points from 1 to 0.0001, stay there for 29 points" />
          <div class="caption">
            <p>f 2 0 129 5 1 100 0.0001 29 - waveform that goes over 100 points from 1 to 0.0001, stay there for 29 points</p>
          </div>
        </div>
        <p>

      </p>
        <div class="mediaobject">
          <img src="images/gen05_2.png" alt="f 3 0 129 5 0.00001 87 1 22 .5 20 0.0001 - waveform that goes from 0.00001 to 1 in 87 points, then from 1 to .5 in 22 points and then from .5 to 0.0001 in 20 points" />
          <div class="caption">
            <p>f 3 0 129 5 0.00001 87 1 22 .5 20 0.0001 - waveform that goes from 0.00001 to 1 in 87 points, then from 1 to .5 in 22 points and then from .5 to 0.0001 in 20 points</p>
          </div>
        </div>
        <p>

    </p>
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      <div class="refsect1">
        <a id="idp213692960"></a>
        <h2>See Also</h2>
        <p>
       <a class="link" href="GEN06.html" title="GEN06"><em class="citetitle">GEN06</em></a>,
       <a class="link" href="GEN07.html" title="GEN07"><em class="citetitle">GEN07</em></a>, and
       <a class="link" href="GEN08.html" title="GEN08"><em class="citetitle">GEN08</em></a>
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